Home / 13,318.40-19,973.12-6,388.48

Finding the Fourth Proportional to 13,318.40, 19,973.12 and 6,388.48

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Solution

The fourth proportional to 13,318.40, 19,973.12 and 6,388.48 is: 9,580.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318.40 : 19,973.12 = 6,388.48 : x
  2. Step 2: Convert to fraction form
    13,318.40/19,973.12 = 6,388.48/x
  3. Step 3: Cross multiply
    13,318.40x = 19,973.12 × 6,388.48
  4. Step 4: Simplify right side
    13,318.40x = 127,597,877.66
  5. Step 5: Solve for x
    x = 127,597,877.66/13,318.40
  6. Step 6: Final answer
    x = 9,580.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.